CN210136356U

CN210136356U - Optical imaging lens

Info

Publication number: CN210136356U
Application number: CN201921112260.2U
Authority: CN
Inventors: 徐武超; 陈晨; 徐标; 周楹; 张凯元; 戴付建; 赵烈烽
Original assignee: Zhejiang Sunny Optics Co Ltd
Current assignee: Zhejiang Sunny Optics Co Ltd
Priority date: 2019-07-16
Filing date: 2019-07-16
Publication date: 2020-03-10
Anticipated expiration: 2029-07-16

Abstract

The present application provides an optical imaging lens, sequentially from an object side to an image side along an optical axis, comprising: a first lens having a positive optical power; the image side surface of the second lens is a concave surface; a third lens having optical power; a fourth lens having a negative optical power; a fifth lens element with a focal power, wherein the object-side surface of the fifth lens element is convex, and the image-side surface of the fifth lens element is convex; a sixth lens having optical power; the curvature radius R11 of the object side surface of the sixth lens and the curvature radius R12 of the image side surface of the sixth lens meet | R11/R12< 1; the aperture value Fno of the optical imaging lens and the half of the diagonal length ImgH of the effective pixel area on the imaging surface of the optical imaging lens meet the condition that Fno/ImgH is less than 0.5mm^‑1。

Description

Optical imaging lens

Technical Field

The present application relates to an optical imaging lens, and in particular to an optical imaging lens including six lenses.

Background

At present, the requirement on the imaging function of the portable electronic device is higher and higher, and the optical characteristics of the optical imaging lens directly affect the imaging quality of the initial image, so that the higher and higher requirement on the performance of the optical imaging lens used in cooperation with the portable electronic device is also provided. Particularly, with the improvement of the performance of an image sensor, an optical imaging lens with large aperture, large image plane and good image quality is desired in the industry.

SUMMERY OF THE UTILITY MODEL

The present application provides an optical imaging lens, such as a large aperture, large image plane optical imaging lens, that may address at least one of the above-identified deficiencies in the prior art.

The present application provides an optical imaging lens, which sequentially comprises, from an object side to an image side along an optical axis: a first lens having a positive optical power; the image side surface of the second lens is a concave surface; a third lens having optical power; a fourth lens having a negative optical power; a fifth lens element with a focal power, wherein the object-side surface of the fifth lens element is convex, and the image-side surface of the fifth lens element is convex; a sixth lens having optical power.

According to the embodiment of the application, the curvature radius R11 of the object side surface of the sixth lens and the curvature radius R12 of the image side surface of the sixth lens can satisfy | R11/R12| < 1.

According toAccording to the embodiment of the application, the aperture value Fno of the optical imaging lens and the half of the diagonal length ImgH of the effective pixel area on the imaging surface of the optical imaging lens can meet the condition that Fno/ImgH is less than 0.5mm^-1。

According to the embodiment of the application, the effective focal length f of the optical imaging lens and the curvature radius R12 of the image side surface of the sixth lens can satisfy f/R12 < 1.

According to an embodiment of the present application, a radius of curvature R1 of the object-side surface of the first lens and a radius of curvature R11 of the object-side surface of the sixth lens may satisfy-2 < R1/R11 < -1.

According to the embodiment of the present application, a radius of curvature R9 of the object-side surface of the fifth lens and a radius of curvature R10 of the image-side surface of the fifth lens may satisfy 0 < (R9+ R10)/(R9-R10) < 0.5.

According to the embodiment of the present application, the separation distance T23 on the optical axis of the second lens and the third lens and the separation distance T34 on the optical axis of the third lens and the fourth lens may satisfy 1 < T23/T34 < 2.

According to the embodiment of the present application, the separation distance T45 on the optical axis of the fourth lens and the fifth lens and the separation distance T56 on the optical axis of the fifth lens and the sixth lens may satisfy 0.8 < T45/T56 < 1.3.

According to the embodiment of the application, the central thickness CT2 of the second lens on the optical axis and the central thickness CT3 of the third lens on the optical axis can satisfy 0.7 < CT2/CT3 < 1.1.

According to the embodiment of the application, the central thickness CT3 of the third lens on the optical axis and the central thickness CT4 of the fourth lens on the optical axis can satisfy 0.7 < CT3/CT4 < 1.1.

According to the embodiment of the present application, a sum Σ CT of center thicknesses on the optical axis of the first to sixth lenses, respectively, and a sum Σ AT of a separation distance on the optical axis of any adjacent two lenses of the first to sixth lenses may satisfy 1.4 < Σ CT/Σ AT < 1.8.

According to the embodiment of the application, the axial distance BFL from the image side surface of the sixth lens element to the imaging surface of the optical imaging lens and the axial distance TTL from the object side surface of the first lens element to the imaging surface of the optical imaging lens can satisfy 0.15 < BFL/TTL < 0.2.

According to the embodiment of the application, the edge thickness ET4 of the fourth lens and the central thickness CT4 of the fourth lens on the optical axis can satisfy 0.8 < ET4/CT4 < 1.

According to the embodiment of the application, the maximum effective radius DT21 of the object side surface of the second lens and the maximum effective radius DT32 of the image side surface of the third lens can satisfy 0.8 < DT21/DT32 < 1.1.

According to the embodiment of the application, the maximum effective radius DT52 of the image side surface of the fifth lens and the maximum effective radius DT61 of the object side surface of the sixth lens can satisfy 0.8 < DT52/DT61 < 1.

According to the embodiment of the present application, an on-axis distance SAG51 from an intersection point of an object-side surface of the fifth lens and the optical axis to an effective radius vertex of the object-side surface of the fifth lens and an on-axis distance SAG61 from an intersection point of an object-side surface of the sixth lens and the optical axis to an effective radius vertex of the object-side surface of the sixth lens may satisfy 0.3 < SAG51/SAG61 < 0.6.

The present application provides an optical imaging lens including a plurality of (e.g., six) lenses, which has the beneficial effects of high-pixel, large-aperture and high-definition imaging by reasonably distributing the focal power of each lens, the surface type, the center thickness of each lens, the on-axis distance between each lens, and the like, and each lens is easily processed.

Drawings

The above and other advantages of embodiments of the present application will become apparent from the detailed description with reference to the following drawings, which are intended to illustrate and not to limit exemplary embodiments of the present application. In the drawings:

fig. 1 is a schematic structural diagram of an optical imaging lens according to a first embodiment of the present application;

fig. 2A to 2D sequentially show an axial chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve according to a first embodiment of the present application;

fig. 3 is a schematic structural view showing an optical imaging lens according to a second embodiment of the present application;

fig. 4A to 4D sequentially show an on-axis chromatic aberration curve, an astigmatic curve, a distortion curve, and a magnification chromatic aberration curve according to a second embodiment of the present application;

fig. 5 is a schematic structural view showing an optical imaging lens according to a third embodiment of the present application;

fig. 6A to 6D sequentially show an axial chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve according to a third embodiment of the present application;

fig. 7 is a schematic configuration diagram showing an optical imaging lens according to a fourth embodiment of the present application;

fig. 8A to 8D sequentially show an axial chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve according to the fourth embodiment of the present application.

Fig. 9 is a schematic structural view showing an optical imaging lens according to a fifth embodiment of the present application;

fig. 10A to 10D sequentially show an axial chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve according to example five of the present application;

fig. 11 is a schematic structural view showing an optical imaging lens according to a sixth embodiment of the present application; and

fig. 12A to 12D sequentially show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve according to a sixth embodiment of the present application.

Detailed Description

For a better understanding of the present application, various aspects of the present application will be described in more detail with reference to the accompanying drawings. It should be understood that the detailed description is merely illustrative of exemplary embodiments of the present application and does not limit the scope of the present application in any way. Like reference numerals refer to like elements throughout the specification. The expression "and/or" includes any and all combinations of one or more of the associated listed items.

It should be noted that in this specification, the expressions first, second, third, etc. are used only to distinguish one feature from another, and do not represent any limitation on the features. Accordingly, the first lens of the optical imaging lens discussed below may also be referred to as the second lens or the third lens without departing from the teachings of the present application.

In the drawings, the thickness, size, and shape of the lens have been slightly exaggerated for convenience of explanation. In particular, the shapes of the spherical or aspherical surfaces shown in the drawings are shown by way of example. That is, the shape of the spherical surface or the aspherical surface is not limited to the shape of the spherical surface or the aspherical surface shown in the drawings. The figures are purely diagrammatic and not drawn to scale.

Herein, the paraxial region refers to a region near the optical axis. If the lens surface is convex and the convex position is not defined, it means that the lens surface is convex at least in the paraxial region; if the lens surface is concave and the concave position is not defined, it means that the lens surface is concave at least in the paraxial region. In each lens, the surface closest to the subject is referred to as the object side of the lens; in each lens, the surface closest to the imaging plane is referred to as the image side surface of the lens.

It will be further understood that the terms "comprises," "comprising," "has," "having," "includes" and/or "including," when used in this specification, specify the presence of stated features, elements, and/or components, but do not preclude the presence or addition of one or more other features, elements, components, and/or groups thereof. Moreover, when a statement such as "at least one of" appears after a list of listed features, the entirety of the listed features is modified rather than modifying individual elements in the list. Furthermore, when describing embodiments of the present application, the use of "may" mean "one or more embodiments of the present application. Also, the term "exemplary" is intended to refer to an example or illustration.

Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.

The features, principles, and other aspects of the present application are described in detail below.

An optical imaging lens according to an exemplary embodiment of the present application may include: the lens includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens. The six lenses are arranged in order from the object side to the image side along the optical axis, and an air space may be provided between each adjacent lens.

In an exemplary embodiment, the first lens has a positive optical power; the second lens has negative focal power, and the image side surface of the second lens is a concave surface; the third lens has positive focal power or negative focal power; the fourth lens has negative focal power; the fifth lens has positive focal power or negative focal power, the object side surface of the fifth lens is a convex surface, and the image side surface of the fifth lens is a convex surface; the sixth lens has positive power or negative power. The optical power and the surface type are reasonably distributed, so that the optical imaging lens has high-pixel imaging.

In an exemplary embodiment, the optical imaging lens provided by the present application may further include a diaphragm disposed between the object side and the first lens.

In an exemplary embodiment, the optical imaging lens provided by the present application may satisfy the conditional expression | R11/R12| < 1, where R11 is a radius of curvature of an object-side surface of the sixth lens and R12 is a radius of curvature of an image-side surface of the sixth lens. In an exemplary embodiment, R11 and R12 may satisfy | R11/R12| < 0.3. The curvature radiuses of the two mirror surfaces of the sixth lens are controlled, so that the matching of a Chief Ray Angle (CRA) of the optical imaging lens and a photosensitive sensor at an imaging surface is facilitated, a long rear working distance is obtained, and the imaging quality of the optical imaging lens is improved.

In an exemplary embodiment, the optical imaging lens provided by the application can satisfy the conditional expression Fno/ImgH < 0.5mm^-1Where Fno is the aperture value of the optical imaging lens and ImgH is the aperture value at the imaging plane of the optical imaging lensHalf the length of the diagonal of the effective pixel area. In an exemplary embodiment, Fno and ImgH may satisfy Fno/ImgH < 0.42mm^-1. The optical imaging lens has a large image surface and a large aperture by controlling the ratio of the aperture value to the image height of the optical imaging lens.

In an exemplary embodiment, the optical imaging lens provided by the application can satisfy the conditional expression f/R12 < 1, wherein f is an effective focal length of the optical imaging lens, and R12 is a curvature radius of an image side surface of the sixth lens. In an exemplary embodiment, f and R12 may satisfy f/R12 < 0.8. The ratio of the effective focal length of the optical imaging lens to the curvature radius of the image side surface of the sixth lens is configured, so that the axial spherical aberration of the optical imaging lens is favorably corrected, and the imaging quality of the optical imaging lens is improved.

In an exemplary embodiment, the optical imaging lens provided herein may satisfy the conditional expression-2 < R1/R11 < -1, where R12 is a radius of curvature of an object-side surface of the first lens and R11 is a radius of curvature of an object-side surface of the sixth lens. In exemplary embodiments, R1 and R11 can satisfy-1.30 < R1/R11 < -1.03. By controlling the ratio of the curvature radius of the object side surface of the first lens and the curvature radius of the object side surface of the sixth lens, the field curvature and astigmatism of the optical imaging system are favorably corrected, and in addition, each lens is easy to process and has good process quality.

In an exemplary embodiment, the optical imaging lens provided herein may satisfy the conditional expression 0 < (R9+ R10)/(R9-R10) < 0.5, where R9 is a radius of curvature of an object-side surface of the fifth lens and R10 is a radius of curvature of an image-side surface of the fifth lens. In exemplary embodiments, R9 and R10 may satisfy 0.20 < (R9+ R10)/(R9-R10) < 0.45. By controlling the curvature radius of the two mirror surfaces of the fifth lens, the contribution of the two mirror surfaces of the fifth lens to the astigmatism of the optical imaging lens can be effectively controlled, and further, the image quality of the middle view field and the image quality of the aperture zone of the optical imaging lens are controlled, so that the imaging quality of the optical imaging lens is high.

In an exemplary embodiment, the optical imaging lens provided by the present application may satisfy the conditional expression 1 < T23/T34 < 2, where T23 is a separation distance of the second lens and the third lens on the optical axis, and T34 is a separation distance of the third lens and the fourth lens on the optical axis. In exemplary embodiments, T23 and T34 may satisfy 1.20 < T23/T34 < 1.85. The thickness ratio of the air space on the two sides of the third lens is controlled, so that the structural compactness of the optical imaging lens is improved, and meanwhile, the sensitivity of the air space to field curvature is reduced.

In an exemplary embodiment, the optical imaging lens provided by the present application may satisfy the conditional expression 0.8 < T45/T56 < 1.3, where T45 is a separation distance of the fourth lens and the fifth lens on the optical axis, and T56 is a separation distance of the fifth lens and the sixth lens on the optical axis. In exemplary embodiments, T45 and T56 may satisfy 0.85 < T45/T56 < 1.25. Controlling the thickness ratio of the air space on both sides of the fifth lens can compensate for the amount of distortion of the optical imaging lens and is advantageous for adjusting the amount of contribution of the first to third lenses to the distortion of the optical imaging lens.

In an exemplary embodiment, the optical imaging lens provided by the present application may satisfy the conditional expression 0.7 < CT2/CT3 < 1.1, where CT2 is a central thickness of the second lens on the optical axis and CT3 is a central thickness of the third lens on the optical axis. In an exemplary embodiment, CT2 and CT3 may satisfy 0.75 < CT2/CT3 < 1.05. The thickness ratio of the second lens to the third lens is controlled, so that the structural compactness of the optical imaging lens is guaranteed, and the optical imaging lens is lighter.

In an exemplary embodiment, the optical imaging lens provided by the present application may satisfy the conditional expression 0.7 < CT3/CT4 < 1.1, CT3 being a central thickness of the third lens on an optical axis, and CT4 being a central thickness of the fourth lens on the optical axis. In an exemplary embodiment, CT3 and CT4 may satisfy 0.8 < CT3/CT4 < 1.05. The thickness ratio of the third lens to the fourth lens is controlled, so that the axial chromatic aberration and spherical aberration of the optical imaging system can be corrected, and the optical imaging system has good imaging performance.

In an exemplary embodiment, the optical imaging lens provided by the present application may satisfy the conditional expression 1.4 < Σ CT/Σ AT < 1.8, where Σ AT is a sum of central thicknesses of the first to sixth lenses on the optical axis, and Σ AT is a sum of separation distances of adjacent two lenses of the first to sixth lenses on the optical axis. In an exemplary embodiment, Σ CT and Σ AT may satisfy 1.45 < Σ CT/Σ AT < 1.70. The ratio of the sum of the thicknesses of the lenses from the first lens to the sixth lens to the sum of the thicknesses of the air spaces between the adjacent lenses is controlled, so that the thicknesses of the lenses can be balanced, the residual distortion range of the lenses after assembly is further controlled, and the optical imaging lens has good distortion performance.

In an exemplary embodiment, the optical imaging lens provided by the present application may satisfy the conditional expression 0.15 < BFL/TTL < 0.2, where BFL is an on-axis distance from an image-side surface of the sixth lens element to an image plane of the optical imaging lens, and TTL is an on-axis distance from an object-side surface of the first lens element to the image plane of the optical imaging lens. In an exemplary embodiment, BFL and TTL can satisfy 0.16 < BFL/TTL < 0.19. By controlling the ratio of the rear working distance to the optical length, the long rear working distance is favorably obtained, and the angle of the principal ray in the field of view is suitable, so that the optical imaging lens is suitable for being matched with different photosensitive chips.

In an exemplary embodiment, the optical imaging lens provided by the present application may satisfy the conditional expression 0.8 < ET4/CT4 < 1, where ET4 is an edge thickness of the fourth lens, and CT4 is a center thickness of the fourth lens on an optical axis. In an exemplary embodiment, ET4 and CT4 may satisfy 0.85 < ET4/CT4 < 0.95. The ratio of the edge thickness of the fourth lens to the center thickness of the fourth lens is controlled, so that the fourth lens is easy to process and has better process performance.

In an exemplary embodiment, the optical imaging lens provided by the present application may satisfy the conditional expression 0.8 < DT21/DT32 < 1.1, where DT21 is the maximum effective radius of the object-side surface of the second lens and DT32 is the maximum effective radius of the image-side surface of the third lens. In exemplary embodiments, DT21 and DT32 may satisfy 0.9 < DT21/DT32 < 1.05. The second lens and the third lens have good processability by controlling the maximum effective radius of the object side surface of the second lens and the maximum effective radius of the image side surface of the third lens.

In an exemplary embodiment, the optical imaging lens provided by the present application may satisfy the conditional expression 0.8 < DT52/DT61 < 1, DT52 being a maximum effective radius of an image-side surface of the fifth lens, and DT61 being a maximum effective radius of an object-side surface of the sixth lens. In exemplary embodiments, DT52 and DT61 may satisfy 0.85 < DT52/DT61 < 0.90. By controlling the maximum effective radius of the image side surface of the fifth lens and the maximum effective radius of the object side surface of the sixth lens, the relative brightness of the edge position of the visual field of the optical imaging lens is improved, the chip at the edge position of the visual field is improved correspondingly, and the image is prevented from appearing dark corners.

In an exemplary embodiment, the optical imaging lens provided by the present application may satisfy the conditional expression 0.3 < SAG51/SAG61 < 0.6, where SAG51 is an on-axis distance from an intersection point of an object-side surface and an optical axis of the fifth lens to an effective radius vertex of the object-side surface of the fifth lens, SAG61 is an on-axis distance from an intersection point of an object-side surface and an optical axis of the sixth lens to an effective radius vertex of the object-side surface of the sixth lens, and in an exemplary embodiment, SAG51 and SAG61 may satisfy 0.35 < SAG51/SAG61 < 0.55. The plane shape of the two mirror surfaces is smoothly transited by controlling the rise of the object side surface of the fifth lens and the rise of the object side surface of the sixth lens, the two mirror surfaces are machined and formed, and the fifth lens and the sixth lens have good machinability and process performance.

Optionally, the optical imaging lens may further include a filter for correcting color deviation and/or a protective glass for protecting a photosensitive element located at the imaging surface.

The optical imaging lens according to the above-described embodiment of the present application may employ a plurality of lenses, for example, six lenses as described above. The optical imaging lens has the characteristics of good performance, high pixel and large aperture and easiness in manufacturing and obtaining by reasonably distributing the focal power and the surface type of each lens, the central thickness of each lens, the on-axis distance between each lens and the like. The optical imaging lens provided by the embodiment of the application has high-quality imaging performance.

In the embodiment of the present application, an aspherical mirror surface is often used as the mirror surface of each lens. At least one mirror surface of the object side surface of the first lens to the image side surface of the sixth lens is an aspherical mirror surface. The aspheric lens is characterized in that: the curvature varies continuously from the center of the lens to the periphery of the lens. Unlike a spherical lens having a constant curvature from the center of the lens to the periphery of the lens, an aspherical lens has better curvature radius characteristics, and has advantages of improving distortion aberration and improving astigmatic aberration. After the aspheric lens is adopted, the aberration generated during imaging can be eliminated as much as possible, thereby improving the imaging quality.

Alternatively, at least one of the object-side surface and the image-side surface of each of the first lens, the second lens, the third lens, the fourth lens, the fifth lens, and the sixth lens may be an aspherical surface. Optionally, each of the first, second, third, fourth, fifth, and sixth lenses may have an object-side surface and an image-side surface that are aspheric. Optionally, the object-side surface and the image-side surface of the first lens element, and the object-side surface and the image-side surface of the sixth lens element are aspheric. Optionally, the object-side surface and the image-side surface of the fourth lens element, and the object-side surface and the image-side surface of the fifth lens element are aspheric. Optionally, the image-side surface of the fifth lens element and the object-side surface of the sixth lens element are aspheric. Optionally, the object-side surface of the first lens element, the object-side surface of the fourth lens element, the object-side surface of the fifth lens element, and the object-side surface of the sixth lens element are aspheric.

Specific examples of an optical imaging lens applicable to the above-described embodiments are further described below with reference to the drawings.

Example one

Referring to fig. 1 to fig. 2D, the optical imaging lens of the present embodiment, in order from an object side to an image side along an optical axis, includes: a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, and a filter E7. A stop STO may be disposed between the first lens E1 and the object side. Any two adjacent lenses may have an air space between them.

The first lens element E1 has positive power, and has a convex object-side surface S1 and a concave image-side surface S2. The second lens element E2 has negative power, and has a convex object-side surface S3 and a concave image-side surface S4. The third lens element E3 has negative power, and has a concave object-side surface S5 and a convex image-side surface S6. The fourth lens element E4 has negative power, and has a convex object-side surface S7 and a concave image-side surface S8. The fifth lens element E5 has positive power, and has a convex object-side surface S9 and a convex image-side surface S10. The sixth lens element E6 has negative power, and has a concave object-side surface S11 and a concave image-side surface S12. Filter E7 has an object side S13 and an image side S14. The optical imaging lens of the present embodiment has an imaging surface S15. Light from the object sequentially passes through the surfaces (S1 to S14) and is imaged on the imaging surface S15.

Table 1 shows a basic parameter table of the optical imaging lens of the present embodiment, in which the units of the curvature radius, the thickness, and the focal length are all millimeters (mm), specifically as follows:

TABLE 1

Wherein, TTL is an axial distance from the object-side surface S1 of the first lens element E1 to the imaging surface S15 of the optical imaging lens, ImgH is a half of a diagonal length of an effective pixel area on the imaging surface of the optical imaging lens, f is an effective focal length of the optical imaging lens, and Fno is an aperture value of the optical imaging lens.

The object-side surface and the image-side surface of any one of the first lens element E1 to the sixth lens element E6 of the optical imaging lens are aspheric, and the surface shape x of each aspheric lens can be defined by, but is not limited to, the following aspheric formula:

wherein x is the rise of the distance from the aspheric surface vertex to the aspheric surface vertex when the aspheric surface is at the position with the height of h along the optical axis direction; c is the paraxial curvature of the aspheric surface, c being 1/R (i.e., paraxial curvature c is the inverse of radius of curvature R in table 1 above); k is a conic coefficient; ai is the correction coefficient of the i-th order of the aspherical surface. Table 2 below shows the high-order term coefficients A that can be used for the aspherical surfaces S1 to S12 according to example one₄、A₆、A₈、A₁₀、A₁₂、A₁₄、A₁₆、A₁₈And A₂₀。

TABLE 2

Fig. 2A shows an on-axis chromatic aberration curve of the optical imaging lens of the present embodiment, which represents deviations of converging focal points of light rays of different wavelengths after passing through the optical imaging lens. Fig. 2B shows an astigmatism curve representing a meridional field curvature and a sagittal field curvature of the optical imaging lens of the present embodiment. Fig. 2C shows a distortion curve of the optical imaging lens of the present embodiment, which represents distortion magnitude values corresponding to different image heights. Fig. 2D shows a chromatic aberration of magnification curve of the optical imaging lens of the present embodiment, which represents the deviation of different image heights on the imaging surface after the light passes through the optical imaging lens. As can be seen from fig. 2A to 2D, the optical imaging lens of the present embodiment can achieve good imaging quality.

Example two

In the following description of the optical imaging lens according to the second embodiment of the present application with reference to fig. 3 to 4D, for the sake of brevity, a description of a part similar to that of the optical imaging lens of the first embodiment will be omitted.

The optical imaging lens of this embodiment, in order from an object side to an image side along an optical axis, includes: a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, and a filter E7. A stop STO may be disposed between the first lens E1 and the object side. Any two adjacent lenses may have an air space between them.

The first lens element E1 has positive power, and has a convex object-side surface S1 and a concave image-side surface S2. The second lens element E2 has negative power, and has a convex object-side surface S3 and a concave image-side surface S4. The third lens element E3 has positive power, and has a convex object-side surface S5 and a concave image-side surface S6. The fourth lens element E4 has negative power, and has a convex object-side surface S7 and a concave image-side surface S8. The fifth lens element E5 has positive power, and has a convex object-side surface S9 and a convex image-side surface S10. The sixth lens element E6 has negative power, and has a concave object-side surface S11 and a concave image-side surface S12. Filter E7 has an object side S13 and an image side S14. The optical imaging lens of the present embodiment has an imaging surface S15. Light from the object sequentially passes through the surfaces (S1 to S14) and is imaged on the imaging surface S15.

Table 3 shows a basic parameter table of the optical imaging lens of the present embodiment, in which the units of the curvature radius, the thickness, and the focal length are all millimeters (mm), and table 4 shows high-order term coefficients of each aspheric surface that can be used in the optical imaging lens of the present embodiment, wherein each aspheric surface type can be defined by the foregoing formula (1), specifically as follows:

TABLE 3

TABLE 4

Fig. 4A shows an on-axis chromatic aberration curve of the optical imaging lens of the present embodiment, which represents the deviation of the convergent focus of light rays of different wavelengths after passing through the optical imaging lens. Fig. 4B shows an astigmatism curve representing a meridional field curvature and a sagittal field curvature of the optical imaging lens of the present embodiment. Fig. 4C shows a distortion curve of the optical imaging lens of the present embodiment, which represents distortion magnitude values corresponding to different image heights. Fig. 4D shows a chromatic aberration of magnification curve of the optical imaging lens of the present embodiment, which represents deviations of different image heights on the imaging surface after light passes through the optical imaging lens. As can be seen from fig. 4A to 4D, the optical imaging lens provided in the present embodiment can achieve good imaging quality.

EXAMPLE III

An optical imaging lens according to a third embodiment of the present application is described below with reference to fig. 5 to 6D. The optical imaging lens of this embodiment, in order from an object side to an image side along an optical axis, includes: a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, and a filter E7. A stop STO may be disposed between the first lens E1 and the object side. Any two adjacent lenses may have an air space between them.

The first lens element E1 has positive power, and has a convex object-side surface S1 and a concave image-side surface S2. The second lens element E2 has negative power, and has a convex object-side surface S3 and a concave image-side surface S4. The third lens element E3 has positive power, and has a concave object-side surface S5 and a convex image-side surface S6. The fourth lens element E4 has negative power, and has a concave object-side surface S7 and a concave image-side surface S8. The fifth lens element E5 has positive power, and has a convex object-side surface S9 and a convex image-side surface S10. The sixth lens element E6 has negative power, and has a concave object-side surface S11 and a concave image-side surface S12. Filter E7 has an object side S13 and an image side S14. The optical imaging lens of the present embodiment has an imaging surface S15. Light from the object sequentially passes through the surfaces (S1 to S14) and is imaged on the imaging surface S15.

Table 5 shows a basic parameter table of the optical imaging lens of the present embodiment, in which the units of the curvature radius, the thickness, and the focal length are all millimeters (mm), and table 6 shows high-order term coefficients of each aspheric surface that can be used in the optical imaging lens of the present embodiment, wherein each aspheric surface type can be defined by the foregoing formula (1), specifically as follows:

TABLE 5

TABLE 6

Fig. 6A shows an on-axis chromatic aberration curve of the optical imaging lens of the present embodiment, which represents the deviation of the convergent focus of light rays of different wavelengths after passing through the optical imaging lens. Fig. 6B shows an astigmatism curve representing a meridional field curvature and a sagittal field curvature of the optical imaging lens of the present embodiment. Fig. 6C shows a distortion curve of the optical imaging lens of the present embodiment, which represents distortion magnitude values corresponding to different image heights. Fig. 6D shows a chromatic aberration of magnification curve of the optical imaging lens of the present embodiment, which represents deviations of different image heights on the imaging surface after light passes through the optical imaging lens. As can be seen from fig. 6A to 6D, the optical imaging lens provided in the present embodiment can achieve good imaging quality.

Example four

An optical imaging lens according to a fourth embodiment of the present application is described below with reference to fig. 7 to 8D. The optical imaging lens of this embodiment, in order from an object side to an image side along an optical axis, includes: a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, and a filter E7. A stop STO may be disposed between the first lens E1 and the object side. Any two adjacent lenses may have an air space between them.

The first lens element E1 has positive power, and has a convex object-side surface S1 and a concave image-side surface S2. The second lens element E2 has negative power, and has a convex object-side surface S3 and a concave image-side surface S4. The third lens element E3 has negative power, and has a convex object-side surface S5 and a concave image-side surface S6. The fourth lens element E4 has negative power, and has a convex object-side surface S7 and a concave image-side surface S8. The fifth lens element E5 has positive power, and has a convex object-side surface S9 and a convex image-side surface S10. The sixth lens element E6 has negative power, and has a concave object-side surface S11 and a concave image-side surface S12. Filter E7 has an object side S13 and an image side S14. The optical imaging lens of the present embodiment has an imaging surface S15. Light from the object sequentially passes through the surfaces (S1 to S14) and is imaged on the imaging surface S15.

Table 7 shows a basic parameter table of the optical imaging lens of the present embodiment, in which the units of the curvature radius, the thickness, and the focal length are all millimeters (mm), and table 8 shows high-order term coefficients of each aspheric surface that can be used in the optical imaging lens of the present embodiment, wherein each aspheric surface type can be defined by the foregoing formula (1), specifically as follows:

TABLE 7

TABLE 8

Fig. 8A shows an on-axis chromatic aberration curve of the optical imaging lens of the present embodiment, which represents the deviation of the convergent focus of light rays of different wavelengths after passing through the optical imaging lens. Fig. 8B shows an astigmatism curve representing a meridional field curvature and a sagittal field curvature of the optical imaging lens of the present embodiment. Fig. 8C shows a distortion curve of the optical imaging lens of the present embodiment, which represents distortion magnitude values corresponding to different image heights. Fig. 8D shows a chromatic aberration of magnification curve of the optical imaging lens of the present embodiment, which represents deviations of different image heights on the imaging surface after light passes through the optical imaging lens. As can be seen from fig. 8A to 8D, the optical imaging lens provided in the present embodiment can achieve good imaging quality.

EXAMPLE five

An optical imaging lens according to embodiment five of the present application is described below with reference to fig. 9 to 10D. The optical imaging lens of this embodiment, in order from an object side to an image side along an optical axis, includes: a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, and a filter E7. A stop STO may be disposed between the first lens E1 and the object side. Any two adjacent lenses may have an air space between them.

Table 9 shows a basic parameter table of the optical imaging lens of the present embodiment, in which the units of the curvature radius, the thickness, and the focal length are all millimeters (mm), and table 10 shows high-order term coefficients of respective aspherical surfaces that can be used in the optical imaging lens of the present embodiment, wherein each aspherical surface type can be defined by the foregoing formula (1), specifically as follows:

TABLE 9

Watch 10

Fig. 10A shows an on-axis chromatic aberration curve of the optical imaging lens of the present embodiment, which represents the deviation of the convergent focus of light rays of different wavelengths after passing through the optical imaging lens. Fig. 10B shows an astigmatism curve representing a meridional field curvature and a sagittal field curvature of the optical imaging lens of the present embodiment. Fig. 10C shows a distortion curve of the optical imaging lens of the present embodiment, which represents distortion magnitude values corresponding to different image heights. Fig. 10D shows a chromatic aberration of magnification curve of the optical imaging lens of the present embodiment, which represents a deviation of different image heights on the imaging surface after light passes through the optical imaging lens. As can be seen from fig. 10A to 10D, the optical imaging lens provided in the present embodiment can achieve good imaging quality.

EXAMPLE six

An optical imaging lens according to a sixth embodiment of the present application is described below with reference to fig. 11 to 12D. The optical imaging lens of this embodiment, in order from an object side to an image side along an optical axis, includes: a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, and a filter E7. A stop STO may be disposed between the first lens E1 and the object side. Any two adjacent lenses may have an air space between them.

Table 11 shows a basic parameter table of the optical imaging lens of the present embodiment, in which the units of the curvature radius, the thickness, and the focal length are all millimeters (mm), and table 12 shows high-order term coefficients of respective aspherical surfaces that can be used in the optical imaging lens of the present embodiment, wherein each aspherical surface type can be defined by the foregoing formula (1), specifically as follows:

TABLE 11

TABLE 12

Fig. 12A shows an on-axis chromatic aberration curve of the optical imaging lens of the present embodiment, which represents the deviation of the convergent focus of light rays of different wavelengths after passing through the optical imaging lens. Fig. 12B shows an astigmatism curve representing a meridional field curvature and a sagittal field curvature of the optical imaging lens of the present embodiment. Fig. 12C shows a distortion curve of the optical imaging lens of the present embodiment, which represents distortion magnitude values corresponding to different image heights. Fig. 12D shows a chromatic aberration of magnification curve of the optical imaging lens of the present embodiment, which represents a deviation of different image heights on the imaging surface after light passes through the optical imaging lens. As can be seen from fig. 12A to 12D, the optical imaging lens provided in the present embodiment can achieve good imaging quality.

In summary, the first to sixth embodiments correspondingly satisfy the relationship shown in the following table 13.

Watch 13

However, it will be appreciated by those skilled in the art that the number of lenses constituting an optical imaging lens may be varied to achieve the various results and advantages described in the present specification without departing from the claimed subject matter. For example, although six lenses are exemplified in the embodiment, the optical imaging lens is not limited to including six lenses. The optical imaging lens may also include other numbers of lenses, if desired.

In an exemplary embodiment, the present application also provides an image pickup apparatus provided with an electron photosensitive element, which may be a photosensitive coupling element (CCD) or a complementary metal oxide semiconductor element (CMOS), to form an image. The camera device can be a stand-alone camera device such as a digital camera, or a camera module integrated on a mobile electronic device such as a mobile phone. The image pickup apparatus is equipped with the optical imaging lens described above.

Exemplary embodiments of the present application are described above with reference to the accompanying drawings. It should be understood by those skilled in the art that the above-described embodiments are merely examples for illustrative purposes and are not intended to limit the scope of the present application. Any modifications, equivalents and the like which come within the teachings of this application and the scope of the claims should be considered to be within the scope of this application.

Claims

1. The optical imaging lens assembly, in order from an object side to an image side along an optical axis, comprises:

a first lens having a positive optical power;

the image side surface of the second lens is a concave surface;

a third lens having optical power;

a fourth lens having a negative optical power;

a fifth lens element with a focal power, wherein the object-side surface of the fifth lens element is convex, and the image-side surface of the fifth lens element is convex;

a sixth lens having optical power;

the curvature radius R11 of the object side surface of the sixth lens and the curvature radius R12 of the image side surface of the sixth lens meet | R11/R12| < 1;

the aperture value Fno of the optical imaging lens and the half ImgH of the diagonal length of the effective pixel area on the imaging surface of the optical imaging lens meet the condition that Fno/ImgH is less than 0.5mm^-1。

2. The optical imaging lens of claim 1, wherein an effective focal length f of the optical imaging lens and a radius of curvature R12 of an image side surface of the sixth lens satisfy f/R12 < 1.

3. The optical imaging lens of claim 1, wherein a radius of curvature R1 of the object-side surface of the first lens and a radius of curvature R11 of the object-side surface of the sixth lens satisfy-2 < R1/R11 < -1.

4. The optical imaging lens of claim 1, wherein a radius of curvature R9 of an object-side surface of the fifth lens and a radius of curvature R10 of an image-side surface of the fifth lens satisfy 0 < (R9+ R10)/(R9-R10) < 0.5.

5. The optical imaging lens according to claim 1, wherein a separation distance T23 of the second lens and the third lens on the optical axis and a separation distance T34 of the third lens and the fourth lens on the optical axis satisfy 1 < T23/T34 < 2.

6. The optical imaging lens according to claim 1, wherein a separation distance T45 on the optical axis between the fourth lens and the fifth lens and a separation distance T56 on the optical axis between the fifth lens and the sixth lens satisfy 0.8 < T45/T56 < 1.3.

7. The optical imaging lens of claim 1, wherein a central thickness CT2 of the second lens on the optical axis and a central thickness CT3 of the third lens on the optical axis satisfy 0.7 < CT2/CT3 < 1.1.

8. The optical imaging lens of claim 1, wherein a central thickness CT3 of the third lens on the optical axis and a central thickness CT4 of the fourth lens on the optical axis satisfy 0.7 < CT3/CT4 < 1.1.

9. The optical imaging lens according to claim 1, wherein a sum Σ CT of central thicknesses on the optical axis of the first to sixth lenses, respectively, and a sum Σ AT of a separation distance on the optical axis of any adjacent two of the first to sixth lenses satisfy 1.4 < Σ CT/Σ AT < 1.8.

10. The optical imaging lens of claim 1, wherein an on-axis distance BFL from the image-side surface of the sixth lens element to the imaging surface of the optical imaging lens and an on-axis distance TTL from the object-side surface of the first lens element to the imaging surface of the optical imaging lens satisfy 0.15 < BFL/TTL < 0.2.

11. The optical imaging lens of claim 1, wherein an edge thickness ET4 of the fourth lens and a center thickness CT4 of the fourth lens on the optical axis satisfy 0.8 < ET4/CT4 < 1.

12. The optical imaging lens of claim 1, wherein the maximum effective radius DT21 of the object-side surface of the second lens and the maximum effective radius DT32 of the image-side surface of the third lens satisfy 0.8 < DT21/DT32 < 1.1.

13. The optical imaging lens of claim 1, wherein the maximum effective radius DT52 of the image side surface of the fifth lens and the maximum effective radius DT61 of the object side surface of the sixth lens satisfy 0.8 < DT52/DT61 < 1.

14. The optical imaging lens according to any one of claims 1 to 13, wherein an on-axis distance from an intersection point of an object-side surface of the fifth lens and the optical axis to an effective radius vertex of the object-side surface of the fifth lens, SAG51, and an on-axis distance from an intersection point of an object-side surface of the sixth lens and the optical axis to an effective radius vertex of an object-side surface of the sixth lens, SAG61 satisfy 0.3 < SAG51/SAG61 < 0.6.

15. The optical imaging lens assembly, in order from an object side to an image side along an optical axis, comprises:

a first lens having a positive optical power;

the image side surface of the second lens is a concave surface;

a third lens having optical power;

a fourth lens having a negative optical power;

a sixth lens having optical power;

the effective focal length f of the optical imaging lens and the curvature radius R12 of the image side surface of the sixth lens meet f/R12 < 1.

16. The optical imaging lens of claim 15, wherein a radius of curvature R1 of the object side surface of the first lens and a radius of curvature R11 of the object side surface of the sixth lens satisfy-2 < R1/R11 < -1.

17. The optical imaging lens of claim 16, wherein the f no/ImgH < 0.5mm is satisfied between the f no/ImgH of the optical imaging lens and a half ImgH of a diagonal length of an effective pixel area on an imaging surface of the optical imaging lens^-1。

18. The optical imaging lens of claim 15, wherein a radius of curvature R9 of an object-side surface of the fifth lens and a radius of curvature R10 of an image-side surface of the fifth lens satisfy 0 < (R9+ R10)/(R9-R10) < 0.5.

19. The optical imaging lens of claim 15, wherein a separation distance T23 between the second lens and the third lens on the optical axis and a separation distance T34 between the third lens and the fourth lens on the optical axis satisfy 1 < T23/T34 < 2.

20. The optical imaging lens of claim 15, wherein a separation distance T45 on the optical axis between the fourth lens and the fifth lens and a separation distance T56 on the optical axis between the fifth lens and the sixth lens satisfy 0.8 < T45/T56 < 1.3.

21. The optical imaging lens of claim 15, wherein a central thickness CT2 of the second lens on the optical axis and a central thickness CT3 of the third lens on the optical axis satisfy 0.7 < CT2/CT3 < 1.1.

22. The optical imaging lens of claim 15, wherein a central thickness CT3 of the third lens on the optical axis and a central thickness CT4 of the fourth lens on the optical axis satisfy 0.7 < CT3/CT4 < 1.1.

23. The optical imaging lens according to claim 15, wherein a sum Σ CT of central thicknesses on the optical axis of the first to sixth lenses, respectively, and a sum Σ AT of a separation distance on the optical axis of any two adjacent lenses of the first to sixth lenses satisfy 1.4 < Σ CT/Σ AT < 1.8.

24. The optical imaging lens of claim 15, wherein an on-axis distance BFL from the image-side surface of the sixth lens element to the imaging surface of the optical imaging lens and an on-axis distance TTL from the object-side surface of the first lens element to the imaging surface of the optical imaging lens satisfy 0.15 < BFL/TTL < 0.2.

25. The optical imaging lens of claim 15, wherein an edge thickness ET4 of the fourth lens and a center thickness CT4 of the fourth lens on the optical axis satisfy 0.8 < ET4/CT4 < 1.

26. The optical imaging lens of claim 15, wherein the maximum effective radius DT21 of the object-side surface of the second lens and the maximum effective radius DT32 of the image-side surface of the third lens satisfy 0.8 < DT21/DT32 < 1.1.

27. The optical imaging lens of claim 15, wherein the maximum effective radius DT52 of the image side surface of the fifth lens and the maximum effective radius DT61 of the object side surface of the sixth lens satisfy 0.8 < DT52/DT61 < 1.

28. The optical imaging lens of any one of claims 15 to 27, wherein an on-axis distance from an intersection point of an object-side surface of the fifth lens and the optical axis to an effective radius vertex of the object-side surface of the fifth lens, SAG51, and an on-axis distance from an intersection point of an object-side surface of the sixth lens and the optical axis to an effective radius vertex of the object-side surface of the sixth lens, SAG61 satisfy 0.3 < SAG51/SAG61 < 0.6.